Reenforced-box-blank material and method of manufacturing the same



G. W. SWIFT, JR. REENFORCED BOX BLANK MATERIAL AND METHOD OF MANUFACTURING THE SAME.

APPLICATION FILED MAY 2 I. 1920.

Patented Mar. 28, 1922.

3 SHEETS-SHEET 1' WITNESSES INVENTOH TTOR/VEYS (a. w. SWIFT, JR- REENFORCED BOX BLANK MATERIAL AND METHOD OF MANUFACTURING THE SAME.

APPLICATION FILED MAY 2]. 1920.

1,410,622, 7 Patented Mar. 28, 1922.

3 snens snzzr 2.

WI TNESSES G. W. SWIFT, JR. REENFORCED BOX BLANK MATERIAL AND METHOD OF MANUFACTURING THE SAME.

APPLICATION FILED M.AY 21. 1920.

3 SHEETS-SHEET 3.

INVENTOI? WITNESSES GEORGE W. SWIFT, JR., OF BORDENTOWN, NEW JERSEY.

REENFORCED-IBOX-BLANK MATERIAL AND METHOD OF MANUFACTURING THE SAME.

Specification of Letters Patent. Patented Mar. 28, 1922 Application filed May 21, 1920. Serial No. 383,144.

To a]! whom. it may concern Be it known that I, GEORGE l". Swir'r. J12. a citizen of the United States. residing at Bordentown, county of Burlington, and State of New Jersey, have invented certain new and useful Improvements in Reenforced-Box-Blank Materials and Methods of Manufacturing the Same. of which the following is a specification.

This invention relates to the manufacture of reenforced multi-ply paper material especially designed for forming blanks that are to be scored and folded into paper boxes or containers. In the manufacture of reenforced paper boxes it has been the practice heretofore to apply reenforcing strips to the outer face of the box blanks along the lines of prospective folds, either before or after creasing or scoring, or to completely form the box and apply the reenforcing strips to the folded corners of the boxes.

In carrying out my present invention I propose to reenforce the blank material in the process of manufacture by forming longitudinal folds or pleats in one or more of the webs composing the multi-ply fabric. I prefer to form these longitudinal folds in one ofthe surfacing webs or sheets as it is led from its supply roller to the line of application to the other webs to which it is attached. In following out this invention I have found it practicable to continuously fold one of the surfacing sheets or webs by passing it through suitable blade folders arranged to form two parallel spaced. folds or pleats in the web just prior to its being brought into contact with'the filling web of the composite fabric. The folds or pleats referred to are designed to form reenforced longitudinal zones embracing the lines of prospective folds of the box blanks that are to be made. Each fold or pleat will present the added strength of the double thickness of the surfacing web. The finished reenforced composite web material not only presents the strengthened zones for the fold lines of the box blanks to be made, but affords a reenforced material of neat appearance and one which can be economically produced by continuous process of manufacture.

In order that the invention may be more fully understood it will first be described with reference to the accompanying drawings and afterward pointed out more partieularly in the annexed claims.

' ass of manufacture.

In said drawings:

Fig. 1 is a longitudinal sectional elevation of a machine designed to carry out the method of the present application to produce the improved. ree-nforced box blank material.

Fig. 2 is a diagrammatic plan view illustrating the elements for continuously forming longitudinal folds or pleats in one or both of the surfacing sheets during the proc- Fig. 3 is a vertical longitudinal sectional view of the mechanism shown in Fig. 2.

Fig. 4 is a transverse sectional view of the web of material in the process of manu facture. said view being taken on .he line 44 of Fig. 2.

Fig. 5 is a similar view of the material taken on the section line 55 of Fig. 2.

Fig. 6 is a perspective view of a ortion of a web of the improved blank material.

Fig. 7 is a erspective view of a box formed from t e blank of the improved material indicated in Fig. 6.

Fig. 8 is a transverse sectional view of a slightly modified form of the improved blank material.

Fig. 9 is a transverse, sectional view of the modified 'form of material of Figure 8 with the side flaps turned to upright position.

The present invention relates to the improvement in the manufacture of multi-ply paper board, whether of the form embodying a solid filling sheet or a corrugated filling sheet, the purpose being to economically reenforce such multi-ply paper board fabric upon prospective lines of fold in the production of box blanks.

In illustrating the method of manufacturing the improved box blank material embodying the invention of the present applioation, I have'shown in Fi 1 of the drawings a machine for making doublefaced, cellular, paper board covered by my 100 application Serial No. 335,048 filed November 1, 1919. The essentials of this machine are the upper pair of longitudinally corrugated rollers 15, 16 and the lower pair of smooth facing-sheet-applying rollers 20, 21, 1 5

all of which rollers are provided with suitable steam heating devices in the manner well understood in'this art. 55 and 75 are gluing rollers arranged in operative relation respectively to the lower corrugated 110 smooth facing sheet.

passed through iromn 1O roller 16 and first smooth facing roller 20 for applying lines of glue to. the opposite faces of the corrugated filling strip as it is being formed.

35 indicates the web which is formed mto the corrugated fi lling; 66 is one of the smooth facing sheets and 85 is the other The com osite web is and nishing devices in the manner wel understood. i

In carrying out the method of the present application, suitable means are added to a mechanism such as 'ust referred to, for continuously forming ongitudinal folds or pleats in one or both of the surfacing sheets 66 or 85 as it is fed forward to the rolls that ap ly them to the corrugated filling web.

n Fig. 8 I have showna 'modlfication of the finished material in which both of these surfacing sheets are provided with two arallel longitudinally extending folds or p eats alon bla s. In the simplest form of the invention, however, only one of the surfacing .sheets is so reenforced and, therefore, in illustrating the improved method the operations formln the reenforcing folds or pleats is illustrate as applied to only one of the surfacing sheets.

Referring particularly to Figs. 1, 2 and 3, it will be observed that the under surfacing. web 85 passes from its supply roll downwardl in peripheral contact with two pairs of g uing rollers 100, which receive glue from fountain rollers 101 operating in fountain 102. Web 85 thence passes around an idler roller 105 and then over a stationary forming cylinder 110, which has formed in its u per curved surface adjacent to opposite si es the deep fold forming grooves 111 havin wide leading-in throats 112, which gradual y contract and deepen in the direction of the progress of the web.

The inner surfaces of these fold forming grooves 111 are parallel with the line of progress of the web. Cooperating with the grooves 111 are the folder lades 115, which curve slightly from their oints of support inwardly toward the longitudinal planes of the grooves 111 and have their forward straight portion resting free within said grooves. The web of paper 85 passing under the blades 115 and over the forming curved surface of member 110 will be forced gradually into rooves to form downwardly presented fol s such as indicated at 85 in Fig. 4 ofthe drawings. The two plies of these folds 85 are glued together b the lines of glue ap lied to the web by ro lers 100 referred to a ove. 1

After leaving the preliminary fold formers 110 and 115 referred to, the web asses over lue applying rollers 120 operatlng in fount 'ns 121 for the purpose of receiving longitudinal lines of the lines o prospective folds of boxglue upon the under or surface of the web parallel with the downwardl projecting angular folds just "referre to.

The web with downwardly extending folds 85 next passes over the inclined fold turnin blades or bars 125,- which gradually turn to ds 85 inwardly to cause them to adhere to the lines of glue applied by rollers 120. The web then passes t rough the feed ironing rollers 130 and 131, which permanently secures the longitudinal folds of the web to the adjacent surfaces of the web, thereby forming the reinforcements in the surfacing web prior to its application to the composite web or double-faced board referred to.

The surfacing sheets may be formed with the reinforcing folds or pleats by any suitable mechanism. It is preferred to have each reenforced sheet formed with two spaced parallel pleats or folds extending longitudinally and parallel with the edges of the web and each other. These folds constitute strengthening zones havi the strength equal to the number of pfies or thicknesses of the surfacing web.

Referring particularly to Fig. 6, it will be' observed that the composite reenforced blank material may be formed into blanks for boxes or cartons by applying longitudinal creases or scores upon the lines indicated at 9 and transverse creases or scores upon the lines indicated at 10, upon which creased lines the blank is intended to be folded. An lar cuts 12 are made in the longitudinal e .ges of the web in line with the transverse creases 10, said cuts terminating upon the creased lines 11 within the reenforcing folds 85. The fabric being thus creased and cut, it is severed on lines indicated at 14 to form a series of blanks, each of which will have four V-sh'aped cuts 12. Said blanks are designed to be folded into rectangular'box 17 as shown in Fig. 7, the cuts 12 being located at the corners and the folds 85 reenforcing said corners.

In shaping the .box 17 shown in Fig. 7 from the blank just described, the small corner flaps 18 are folded within and retained by the longitudinal flaps 19 as indi cated by dotted lines 1. A reenforced composite multi-pl paper fabric for manufacturing box blanks, comprisin a plurality of webs or sheets permanenfiy fastened together, one of said webs or sheets being formed with integral longitudinal folds or pleats during the process of manufacture.

2. A reenforced composite multi-pl paper fabric for the manufacture of box blanks, comprising a plurality of webs or sheets permanently glued to ther, one of said sheets or webs being formed with continuous integral longitudinal parallel spaced pleats folds in the process of manufacture.

Ill

3. A reenforced composite multi-ply paper fabric for the manufacture of box blanks, comprising a filling web and two surfacing webs permanently glued together, each of said surfacing webs being formed with continuous integral longitudinal strengthening pleats or folds in the process of manufacture.

4. The method of producing reenforced composite multi-ply paper box blank material which consists in continuously gluing together a plurality of paper webs and con tinuously forming integral longitudinal pleats or folds in one of said webs.

5. The method of-prod-ucing reenforced composite multi-ply paper box blank material which consists in continuously forming integral longitudinal pleats or folds in a plurality of webs and gluing said webs together to form a composite web.

6. The method of producing reenforced multi-ply paper board for box blanks which consists in continuousl Y forming parallel pleats or folds in a sur acing Web or sheet, and gluing said pleated or folded Web or sheet to another web or webs, and finally creasing and blanking out box blanks there from.

GEORGE WV. SWIFT, JR. 

